Process of making paper and product thereof



'- Patented Get. 1, 1929 amt-nun L. KENNEDY, or xnmm, NE 1::

PCESS .OF M E0 Drawing.

My invention relates particularly to an improved process of making paper and other fibrous products and similar materials, as Well as the product thereof which is more resistant to electricity, heat, cold, oils and moisture than paper products heretofore made.

The object of my invention is to provide a process of the above character,'and product thereof having the above characteristics, and in which the dielectric is very much higher than in the case of previous paper or fibrous products. Previously, attempts have been made to secure somewhat similar properties by applying a coating in the form of a varnish to the paper but the product so produced becomes stifi' and brittle and loses its natural flexibility and resilience. The product made in accordance with my invention has the above desired improved characteristics and at the same time substantially retains the natural flexibility of the fibres.

Further objects of my invention will appear from the detailed description of the same hereinafter.

While my invention is capable of being carried out in many difierent ways, for the purpose of illustration I shall describe only certain ways of carrying out the same hereinafter.

Example 1.For example, I may take 1 1b., that is to say 454 grams, of cotton rag fibre which has been thoroughly pulped, and add thereto 22 grams of kelp, that is to say, preferably Laminaria containing both the algin compounds and the algulose reduced to an aqueous solution by the incorporation with the kelp of 2 grams of sodium hydroxide dissolved in 25 cc. of Water. These materials are thoroughly mixed together in a pulp beater so as to produce a homogeneous mass. I then add 16 grams of zinc sulphate dissolved in 200 cc. of water and run the beater until the zinc has become thoroughly distributed through the same. The zinc sulphate acts as a precipitant. Then I wash the mass with water until the wash water shows the presence of no sulphates. The mass is then run onto a screen of a paper making machine of the usual type, so as to produce a sheet of paper, which is then dried until only about 5% of mixture is left.

a it. dud J u Application filed March 25, 1927. a Ito. 178,503.

The web of paper is now gilt through a supercalender and the paper 'shed in the usual way in the manufacture of paper. As a result the precipitated algin and algulose is compressed into a film through and around the cotton fibres without afiecting the natural flexibility of the fibrous sheet, while the resistance of the product to electricity, heat, cold, oils, moisture, etc., is greatly increased. For example, the dielectric of the product is about 450 bolts per mill. thickness, that is to say at least 40% hi her than in the case of paper Without the ad ition of the kelp.

Instead of zinc sulphate I may use other metallic salts, lime or mineral acids as a precipitaut.

Example 2.-In this example of my invention I take 1 1b., that is 454 grams, of cotton rag fibre which has been thoroughly pulped, and add thereto 13 grams of kelp preferably Laminaria containing both the algin compounds and algulose reduce to an aqueous solution by the addition thereto of 1 gram of sodium hydroxide dissolved in 25 cc. of water. To the kelp solution I add 5 grams of raw rubber in the form of latex before the solution is added to the pulp. I thereupon incorporate the resultant solution with the pulp in a pulp heater and then add 18 to 20 grams of calcium acetate dissolved in 200 cc. of water and run the beater until perfect distribution has been obtained to form a homogeneous mass. The calcium acetate acts as a precipitant. The product is then washed and run onto a screen of a paper making machine to make a web which is drieduntil there is only 5% of moisture left. Then the web is passed through a supercalender with hot rolls to finish the paper as above, in the previous example, in accordance with the usual steps followed in the manufacture of paper. The temperature of the hot rolls should be about 240 F. As a result the algin, algulose and rubber become compressed in a film through and around the fibres without materially affecting the natural flexibility of the fibrous sheet to obtain, thus the advantageous characteristics above referred to. In this instance I may use, instead of the'rubber, any other binding material including waxes such as beeswax, resins such as rosin, bituminous substances such as asphalt, and I may use as a filler an inert insoluble material in order to obtain the product desired for the several uses to which it may be applied. It will be understood, also, that I may utilize any of these binding material and fillers in the first example of my invention above referredto, or, in fact, in any form of my invention, when desired. Also, in this example, or any other example, I may use any of the precipitants as referred to in the first example. Also, in the above example any other kind of fibre pulp may be used, such as wood pulp, etc.

While I have described my invention above in detail I wish it to be understood that many changes may be made therein without departing from the spirit of the same.

I claim:

1. The process of making paper which comprises incorporating together a fibre pulp and a kelp product formed from alginic acid,

algulose and rubber, and then forming the same into a paper web.

2. The process of making paper which corn prises incorporating together a fibre pulp and a kelp product formed from alginic acid, al gulose and rubber, then forming the same into a paper web and finishing the paper,

3. The process of making paper whichcomprises incorporating together a fibre pulp and a kelp product formed from kelp, including its alginic acid and algulose, which has been solubilized with an alkali and rendered insoluble with a precipitant, and then forming the same into a paper web 4-. The process of making paper which com prises incorporating together a fibre pulp and a kelp product formed from kelp, including its al ginic acid and algulose, which has been solubilized with an alkali and rendered in soluble with a precipitant, then forming the same into a paper web and finishing the paper.

5. The process of making paper which comprises incorporating together a fibre pulp and a kelpproduct formed from alginic acid and ulgulose, comprising a solubilized kelp which is rendered insoluble by reaction with a precipitant after admixture with the fibre pulp,

and then forming the same into a paper web.

6. lhe process of making paper which comprises incorporating together a fibre pulp and a kelp product formed from alginic acid and algulose, comprising a solubilized kelp which is rendered insoluble by reaction with a precipitant after admixture with the fibre pulp, then forming the same into a paper web and finishing the paper. 7

7. The process of making paper which comprises incorporating together a fibre pulp and a kelp product formed from alginic acid and algulose, comprising a solubilized kelp which is rendered insoluble by reaction with a precipitant by a solution of metallic salt after the same into a paper web and finishing the paper.

9. The process of making paper which comprises incorporating together a fibre pulp and a kelp product comprising a solubilized kelp which is rendered insoluble by reaction with a precipitant by a solution of zinc sulphate after admixture with the fibre pulp, and then forming the same into a paper web.

10. The process of making paper which comprisesincorporating together a fibre pulp and a kelp product comprising a solubilized kelp which is rendered insoluble by reaction with a precipitant by a solution of zinc sulphate after admixture with the fibre pulp, then forming the same into a paper web and finishing the paper.

11. The process of making paper which comprises incorporating together a fibre pulp and a kelp product comprising a solubilized kelp which is rendered insoluble by reaction with a precipitant by a solution of zinc sulphate after admixture with the fibre pulp, incorporating a binding material and a filler therewith, and then forming the same into a paper web.

12. The process of making paper which comprises incorporating together a fibre pulp and a kelp product comprising a solubilized kelp which is rendered insoluble by reaction with a precipitant by a'solution of zinc sulmil phate after admixture with the fibre pulp, inv corporating a binding material and a filler therewith. then forming the same into a paper web and finishing the paper.

13. The process of making fibrous products which comprises incorporating together fibrous material, a kelp product formed from alginic acid and alkulose, a filler and rubber, and then forming the same into a coherent mass.

14. A paper containing a kelp product iormed from alginic acid, algulose and rub- 15. A paper containing a fibre pulp, and a kelp product formed from alginic acid, algulose and rubber.

16. A paper containing a kelp product formed from kelp, including its alginic acid and algulose, which has been solubilized with an alkali and rendered insoluble with a precipitant.

17. 1%. paper containing a fibre pulp and a kelp product formed from kelp, including its alginic acid and algulose, which has been solubilized with an alkaliand rendered insoluble with a precipitant.

18. A paper containing a fibre pulp, a kelp product-formed from kel including its alginic acid and algulose, w 'ch has been solubilized with an alkali and rendered insoluble with a precipitant, and a binding material.

19. A paper containin a fibre pulp, a kelp product formed from ke including its alginic acid and algulose, w 'ch has been solubilized with an alkali and rendered insoluble glilth a precipitant, abinding material and a 20. A paper containing a fibre pulp and a kelp product formed from kelp, including its alginic acid and algulose, whlch has beensolubilized and then rendered insoluble the addition of a metallic salt.

21. A paper containing a fibre pulp, a kel product formed from kel including its a ginic acid and algulose, w ich has been solubilized and then rendered insoluble by the addition of a metallic salt, and a binding material.

22. A aper containing a fibre pulp and a kelp pro not formed from kelp, including its algi'nic acid and algulose, which has been solubilized and then rendered insoluble by the addition of zinc sulphate.

23. A paper containing a fibre pulp, a kelp product formed from kelp, including its alginic acid and algulose, which has been soluilized and then rendered insoluble by the addition of zinc sulphate, and a binding material.

24. A fibrous material containing fibre, a kelp product formedfrom kelp including its alginic acid and algulose which has been solubilized and then rendered insoluble with a precipitant, and rubber.

In testimony that I claim the foregoing, I have hereunto set my hand this 2nd day of March, 1927 ARTHUR L. KENNEDY. 

